U.S. patent application number 12/703733 was filed with the patent office on 2011-05-05 for display method for color sequential display.
This patent application is currently assigned to CHUNGHWA PICTURE TUBES, LTD.. Invention is credited to Shian-Jun Chiou, Chia-Lin Liu, Chi-Neng Mo, Wen-Chih Tai, Huan-Ting Zhou.
Application Number | 20110102474 12/703733 |
Document ID | / |
Family ID | 43924957 |
Filed Date | 2011-05-05 |
United States Patent
Application |
20110102474 |
Kind Code |
A1 |
Liu; Chia-Lin ; et
al. |
May 5, 2011 |
DISPLAY METHOD FOR COLOR SEQUENTIAL DISPLAY
Abstract
A display method for a color sequential display is provided. The
method includes the following steps. During a first frame period, a
first color backlight is provided, and a plurality of scan lines is
sequentially enabled according to a first scanning order. During a
second frame period, a second color backlight is provided, and the
scan lines are sequentially enabled according to a second scanning
order. The first frame period and the second frame period are two
neighboring frame periods, and the first scanning order and the
second scanning order are reversed to each other.
Inventors: |
Liu; Chia-Lin; (Taichung
County, TW) ; Chiou; Shian-Jun; (Taipei City, TW)
; Zhou; Huan-Ting; (Taipei County, TW) ; Tai;
Wen-Chih; (Taoyuan County, TW) ; Mo; Chi-Neng;
(Taoyuan County, TW) |
Assignee: |
CHUNGHWA PICTURE TUBES,
LTD.
Taoyuan
TW
|
Family ID: |
43924957 |
Appl. No.: |
12/703733 |
Filed: |
February 10, 2010 |
Current U.S.
Class: |
345/690 ;
345/212 |
Current CPC
Class: |
G09G 3/3413 20130101;
G09G 2310/0283 20130101; G09G 2310/0235 20130101; G09G 2320/0242
20130101 |
Class at
Publication: |
345/690 ;
345/212 |
International
Class: |
G06F 3/038 20060101
G06F003/038; G09G 5/10 20060101 G09G005/10 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 2, 2009 |
TW |
98137162 |
Claims
1. A display method of a color sequential display, comprising:
during a first frame period, providing a first color backlight and
enabling a plurality of scan lines sequentially according to a
first scanning order; and during a second frame period, providing a
second color backlight and enabling the plurality of scan lines
sequentially according to a second scanning order, wherein the
first frame period and the second frame period are two neighboring
frame periods, and the first scanning order and the second scanning
order are reversed to each other.
2. The display method of the color sequential display as claimed in
claim 1, wherein in the first scanning order, a time an
(i-1).sup.th scan line is enabled is earlier than a time an
i.sup.th scan line is enabled, and in the second scanning order,
the time the i.sup.th scan line is enabled is earlier than the time
the (i-1).sup.th scan line is enabled, wherein i is a positive
integer.
3. The display method of the color sequential display as claimed in
claim 1, further comprising: during a third frame period, providing
a third color backlight and enabling the plurality of scan lines
sequentially according to the first scanning order, wherein the
first frame period, the second frame period, and the third frame
period are three neighboring frame periods in sequence.
4. The display method of the color sequential display as claimed in
claim 3, wherein the first frame period, the second frame period,
and the third frame period are respectively 1/180 second.
5. The display method of the color sequential display as claimed in
claim 3, wherein a color of the first color backlight is red, a
color of the second color backlight is green, and a color of the
third color backlight is blue.
6. The display method of the color sequential display as claimed in
claim 3, further comprising: during a fourth frame period,
providing the first color backlight and enabling the plurality of
scan lines sequentially according to the second scanning order;
during a fifth frame period, providing the second color backlight
and enabling the plurality of scan lines sequentially according to
the first scanning order; and during a sixth frame period,
providing the third color backlight and enabling the plurality of
scan lines sequentially according to the second scanning order,
wherein the fourth frame period, the fifth frame period, and the
sixth frame period are three neighboring frame periods in
sequence.
7. The display method of the color sequential display as claimed in
claim 3, further comprising: during a fourth frame period,
providing a fourth color backlight and enabling the plurality of
scan lines sequentially according to the second scanning order,
wherein the first frame period, the second frame period, the third
frame period, and the fourth frame period are four neighboring
frame periods in sequence.
8. The display method of the color sequential display as claimed in
claim 7, wherein the first frame period, the second frame period,
the third frame period, and the fourth frame period are
respectively 1/240 second.
9. The display method of the color sequential display as claimed in
claim 7, wherein a color of the first color backlight is red, a
color of the second color backlight is green, a color of the third
color backlight is blue, and a color of the fourth color backlight
is white.
10. The display method of the color sequential display as claimed
in claim 3, wherein a color of the first color backlight comprises
a first color, a second color, and a third color, a color of the
second color backlight comprises the first color, the second color,
and the third color, and a color of the third color backlight
comprises the first color, the second color, and the third
color.
11. The display method of the color sequential display as claimed
in claim 10, wherein the method of providing the first color
backlight and the second color backlight comprises: providing a
backlight having the first color during a first sub-frame period of
the first frame period; providing a backlight having the second
color during a second sub-frame period of the first frame period;
providing a backlight having the third color during a third
sub-frame period of the first frame period; providing the backlight
having the first color during a fourth sub-frame period of the
second frame period; providing the backlight having the second
color during a fifth sub-frame period of the second frame period;
and providing the backlight having the third color during a sixth
sub-frame period of the second frame period, wherein the first
sub-frame period, the second sub-frame period, and the third
sub-frame period are three neighboring sub-frame periods in
sequence, and the fourth sub-frame period, the fifth sub-frame
period, and the sixth sub-frame period are three neighboring
sub-frame periods in sequence.
12. The display method of the color sequential display as claimed
in claim 11, wherein the first sub-frame period, the second
sub-frame period, the third sub-frame period, the fourth sub-frame
period, the fifth sub-frame period, and the sixth sub-frame period
are respectively 1/180 second.
13. The display method of the color sequential display as claimed
in claim 11, wherein the first color is red, the second color is
green, and the third color is blue.
14. The display method of the color sequential display as claimed
in claim 10, wherein the color of the first color backlight further
comprises a fourth color, the color of the second color backlight
further comprises the fourth color, and the color of the third
color backlight further comprises the fourth color.
15. The display method of the color sequential display as claimed
in claim 14, wherein the method of providing the first color
backlight and the second color backlight comprises: providing a
backlight having the first color in a first sub-frame period of the
first frame period; providing a backlight having the second color
during a second sub-frame period of the first frame period;
providing a backlight having the third color during a third
sub-frame period of the first frame period; providing a backlight
having the fourth color during a fourth sub-frame period of the
first frame period; providing the backlight having the first color
during a fifth sub-frame period of the second frame period;
providing the backlight having the second color during a sixth
sub-frame period of the second frame period, providing the
backlight having the third color during a seventh sub-frame period
of the second frame period; and providing the backlight having the
fourth color during an eighth sub-frame period of the second frame
period, wherein the first sub-frame period, the second sub-frame
period, the third sub-frame period, and the fourth sub-frame period
are four neighboring sub-frame periods in sequence, and the fifth
sub-frame period, the sixth sub-frame period, the seventh sub-frame
period, and the eighth sub-frame period are four neighboring
sub-frame periods in sequence.
16. The display method of the color sequential display as claimed
in claim 15, wherein the first sub-frame period, the second
sub-frame period, the third sub-frame period, the fourth sub-frame
period, the fifth sub-frame period, the sixth sub-frame period, the
seventh sub-frame period, and the eighth sub-frame period are
respectively 1/240 second.
17. The display method of the color sequential display as claimed
in claim 15, wherein the first color is red, the second color is
green, the third color is blue, and the fourth color is white.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims the priority benefit of Taiwan
application serial no. 98137162, filed on Nov. 2, 2009. The
entirety of the above-mentioned patent application is hereby
incorporated by reference herein and made a part of
specification.
BACKGROUND OF THE INVENTION
[0002] 1. Field of the Invention
[0003] The invention relates to a display technique, and more
particularly to a display method of a color sequential display.
[0004] 2. Description of Related Art
[0005] A conventional display is mainly constituted by a backlight
module and a display panel having a color filter. Herein, the
display panel is disposed on the backlight module. The color filter
has filter units of three colors which are red, green, and blue,
respectively. White light emitted by the backlight module passes
through the red, green, and blue filter units to be converted into
red light, green light, and blue light. The display can then
display colorful images.
[0006] Nevertheless, the brightness of the white light emitted by
the backlight module is reduced after passing through the red,
green, and blue filter units. The time consumption and the cost of
fabricating the color filter are unfavorable to the display. As a
consequence, a color sequential display which does not require the
disposition of the color filter has been proposed. In the color
sequential display, a backlight module thereof emits light having
different colors (i.e. red, green, and blue). The colored light
then pass through a display panel that is not disposed with the
color filter, so that color images are displayed by the
display.
[0007] Generally, in a display method of the color sequential
display, scan lines from the first scan line (located on the top of
the display panel) to the last scan line (located at the bottom of
the display panel) are enabled in sequence. The backlight module is
in an off-state before the scan lines are enabled. After the last
scan line has been enabled, the backlight module is turned-on to
provide a light source to the display panel. Next, the backlight
module is turned-off and actions aforementioned are repeated.
[0008] However, a time point of turning-on the backlight module is
very close to a time point at which the actions of the enablement
performed on the last few scan lines are stopped. Thus, liquid
crystal molecules corresponding to the last few rows of pixel units
can not spin to the correct tilting angles due to insufficient
reaction time, such that intermixing results at the very bottom of
the display image (that is, the image displayed by the last few
pixel units).
SUMMARY OF THE INVENTION
[0009] The invention is directed to a display method of a color
sequential display. The display method is capable of reducing an
intermixing occurred in the color sequential display.
[0010] The invention is directed to a display method of a color
sequential display, and the display method includes the following
steps. During a first frame period, a first color backlight is
provided and a plurality of scan lines are enabled sequentially
according to a first scanning order. During a second frame period,
a second color backlight is provided and the scan lines are enabled
sequentially according to a second scanning order. The first frame
period and the second frame period are two neighboring frame
periods. The first scanning order and the second scanning order are
reversed to each other.
[0011] According to an embodiment of the invention, in the first
scanning order, a time the (i-1).sup.th scan line is enabled is
earlier than a time the i.sup.th scan line is enabled, and in the
second scanning order, the time the i.sup.th scan line is enabled
is earlier than the time the (i-1).sup.th scan line is enabled,
where i is a positive integer.
[0012] According to an embodiment of the invention, the display
method of the color sequential display further includes the
following steps. During a third frame period, a third color
backlight is provided and the scan lines are enabled sequentially
according to the first scanning order. The first frame period, the
second frame period, and the third frame period are three
neighboring frame periods in sequence.
[0013] According to an embodiment of the invention, the first frame
period, the second frame period, and the third frame period are
respectively 1/180 second.
[0014] According to an embodiment of the invention, a color of the
first color backlight is red, a color of the second color backlight
is green, and a color of the third color backlight is blue.
[0015] According to an embodiment of the invention, the display
method of the color sequential display further includes the
following steps. During a fourth frame period, the first color
backlight is provided and the scan lines are enabled sequentially
according to the second scanning order. During a fifth frame
period, the second color backlight is provided and the scan lines
are enabled sequentially according to the first scanning order.
During a sixth frame period, the third color backlight is provided
and the scan lines are enabled sequentially according to the second
scanning order. The fourth frame period, the fifth frame period,
and the sixth frame period are three neighboring frame periods in
sequence.
[0016] According to an embodiment of the invention, the display
method of the color sequential display further includes the
following steps. During a fourth frame period, a fourth color
backlight is provided and the scan lines are enabled sequentially
according to the second scanning order. The first frame period, the
second frame period, the third frame period, and the fourth frame
period are four neighboring frame periods in sequence. In one
embodiment, the first frame period, the second frame period, the
third frame period, and the fourth frame period are respectively
1/240 second. In another embodiment, a color of the first color
backlight is red, a color of the second color backlight is green, a
color of the third color backlight is blue, and a color of the
fourth color backlight is white.
[0017] According to an embodiment of the invention, the color of
the first color backlight includes a first color, a second color,
and a third color. The color of the second color backlight includes
the first color, the second color, and the third color. The color
of the third color backlight includes the first color, the second
color, and the third color.
[0018] According to an embodiment of the invention, a backlight
having the first color is provided during a first sub-frame period
of the first frame period. A backlight having the second color is
provided during a second sub-frame period of the first frame
period. A backlight having the third color is provided during a
third sub-frame period of the first frame period. In addition, the
backlight having the first color is provided during a fourth
sub-frame period of the second frame period. The backlight having
the second color is provided during a fifth sub-frame period of the
second frame period. The backlight having the third color is
provided during a sixth sub-frame period of the second frame
period. Here, the first sub-frame period, the second sub-frame
period, and the third sub-frame period are three neighboring
sub-frame periods in sequence. The fourth sub-frame period, the
fifth sub-frame period, and the sixth sub-frame period are three
neighboring sub-frame periods in sequence.
[0019] According to an embodiment of the invention, the first
sub-frame period, the second sub-frame period, the third sub-frame
period, the fourth sub-frame period, the fifth sub-frame period,
and the sixth sub-frame period are respectively 1/180 second.
[0020] According to an embodiment of the invention, the first color
is red, the second color is green, and the third color is blue.
[0021] According to an embodiment of the invention, the color of
the first color backlight further includes a fourth color and the
color of the second color backlight further includes the fourth
color, and the color of the third color backlight further includes
the fourth color. In one embodiment, a backlight having the first
color is provided during a first sub-frame period of the first
frame period. A backlight having the second color is provided
during a second sub-frame period of the first frame period. A
backlight having the third color is provided during a third
sub-frame period of the first frame period. A backlight having the
fourth color is provided during a fourth sub-frame period of the
first frame period. Moreover, the backlight having the first color
is provided during a fifth sub-frame period of the second frame
period. The backlight having the second color is provided during a
sixth sub-frame period of the second frame period. The backlight
having the third color is provided during a seventh sub-frame
period of the second frame period. The backlight having the fourth
color is provided during an eighth sub-frame period of the second
frame period. The first sub-frame period, the second sub-frame
period, the third sub-frame period, and the fourth sub-frame period
are four neighboring sub-frame periods in sequence. The fifth
sub-frame period, the sixth sub-frame period, the seventh sub-frame
period, and the eighth sub-frame period are four neighboring
sub-frame periods in sequence. In one embodiment, the first
sub-frame period, the second sub-frame period, the third sub-frame
period, the fourth sub-frame period, the fifth sub-frame period,
the sixth sub-frame period, the seventh sub-frame period, and the
eighth sub-frame period are respectively 1/240 second. In another
embodiment, the first color is red, the second color is green, the
third color is blue, and the fourth color is white.
[0022] In light of the foregoing, in the display method of the
color sequential display according to the invention, the
intermixing occurred in the color sequential display is reduced by
the reversed scanning order of the scan lines within two
neighboring frame periods.
[0023] In order to make the aforementioned and other features and
advantages of the invention more comprehensible, several
embodiments accompanied with figures are described in detail
below.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings are included to provide a further
understanding of the invention, and are incorporated in and
constitute a part of this specification. The drawings illustrate
embodiments of the invention and, together with the description,
serve to explain the principles of the invention.
[0025] FIG. 1 is a schematic partial cross-sectional view of a
color sequential display according to an embodiment of the
invention.
[0026] FIG. 2 is a schematic partial top view illustrating an
active device array substrate in FIG. 1.
[0027] FIG. 3 is a flow chart of a display method of a color
sequential display according to an embodiment of the invention.
[0028] FIG. 4 is a driving waveform of a color sequential display
according to an embodiment of the invention.
DESCRIPTION OF EMBODIMENTS
[0029] FIG. 1 is a schematic partial cross-sectional view of a
color sequential display according to an embodiment of the
invention. Referring to FIG. 1, a color sequential display 200 of
the present embodiment includes a backlight module 210 and a
display panel 220. The display panel 220 is disposed on the
backlight module 210. The display panel 220 includes an active
device array substrate 222, an opposite substrate 224, and a
display medium layer 226 sandwiched between the active device array
substrate 222 and the opposite substrate 224. The display medium
layer 226, for example, is a liquid crystal layer.
[0030] In the present embodiment, a color filter may not be
disposed in the display panel 220. Moreover, by driving the
backlight module 210, a color to be displayed by the color
sequential display 200 can be shown. Furthermore, the backlight
module 210 of the present embodiment includes a plurality of
backlight sources 212. Herein, light emitted by the backlight
sources 212 has various colors. Therefore, the colorful images are
displayed after the colored light passes through the display panel
220 which is not disposed with the color filter. In the following
embodiment, a portion of the backlight sources 212 is assumed to
emit red light, another portion of the backlight sources 212 is
assumed to emit green light, and the remaining portion of the
backlight sources is assumed to emit blue light.
[0031] FIG. 2 is a schematic partial top view illustrating an
active device array substrate in FIG. 1. Referring to FIG. 2, the
active device array substrate 222 of the present embodiment
includes a substrate 222S and a plurality of scan lines GL.sub.1,
GL.sub.2, GL.sub.3, . . . , GL.sub.n, a plurality of data lines
DL.sub.1, DL.sub.2, DL.sub.3, . . . , DL.sub.n, and a plurality of
pixel units 222P disposed on the substrate 222S. Each pixel unit
222P is electrically connected to the corresponding scan line and
the corresponding data line through an active device T disposed in
the pixel unit 222P. Generally, each pixel unit 222P is further
disposed with a storage capacitor Cst to enhance the display
quality of the color sequential display 200 (illustrated in FIG.
1).
[0032] It should be noted that the color sequential display 200 of
the present embodiment and the display panel 220 thereof further
include other components as well. Other components are omitted in
FIG. 1 and FIG. 2 for the convenience of illustration in the
following embodiments.
[0033] In the following description, the display method of the
color sequential display 200 of the present embodiment is
exemplified. However, the invention is not limited to the
embodiments illustrated below.
First Embodiment
[0034] FIG. 3 is a flow chart illustrating a display method of a
color sequential display according to an embodiment of the
invention. FIG. 4 illustrates a driving waveform of a color
sequential display according to an embodiment of the invention.
Referring to FIG. 2, FIG. 3, and FIG. 4, SG.sub.1, SG.sub.2,
SG.sub.3, SG.sub.i-1, and SG.sub.i represent a scan signal waveform
which is going to be performed on the scan line GL.sub.1, a scan
signal waveform which is going to be performed on the scan line
GL.sub.2, a scan signal waveform which is going to be performed on
the scan line GL.sub.3, a scan signal waveform which is going to be
performed on the (i-1).sup.th scan line (not shown), and a scan
signal waveform which is going to be performed on the i.sup.th scan
line (not shown) respectively. Moreover, "i" is a positive
integer.
[0035] Firstly, in step S301, during a first frame period T1, the
scan lines GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n, are
enabled sequentially. That is, the time the (i-1).sup.th scan line
is enabled is earlier than the time the i.sup.th scan line is
enabled. More specifically, within the first frame period T1, the
high level period of the SG.sub.1 waveform is earlier than the high
level period of the SG.sub.2 waveform, the high level period of the
SG.sub.2 waveform is earlier than the high level period of the
SG.sub.3 waveform, and the high level period of the SG.sub.i-1
waveform is earlier than the high level period of the SG.sub.i
waveform.
[0036] After the enablement performed on the scan lines GL.sub.1,
GL.sub.2, GL.sub.3, . . . , GL.sub.n during the first frame period
T1 has finished, a first color backlight is provided. In the
present embodiment, the first color backlight is a red backlight.
The red backlight is provided, for example, by a portion of the
backlight sources 212 which emits red light.
[0037] After the provision of the first color backlight has
stopped, the scan lines GL.sub.1, GL.sub.2, GL.sub.3, . . . ,
GL.sub.n are enabled again in the next frame period (referred as a
second frame period T2 in the following). Particularly, in the
present embodiment, the order of enabling the scan lines GL.sub.1,
GL.sub.2, GL.sub.3, . . . , GL.sub.n in the second frame period T2
and the order of enabling the scan lines GL.sub.1, GL.sub.2,
GL.sub.3, . . . , GL.sub.n in the first frame period T1 are
reversed to each other.
[0038] More specifically, in step S303, during the second frame
period T2, the scan lines GL.sub.n, . . . , GL.sub.3, GL.sub.2,
GL.sub.1 are enabled sequentially. That is, the time the i.sup.th
scan line is enabled is earlier than the time the (i-1).sup.th scan
line is enabled. Within the second frame period T2, the high level
period of the SG.sub.i waveform is earlier than the high level
period of the SG.sub.i-1 waveform, the high level period of the
SG.sub.3 waveform is earlier than the high level period of the
SG.sub.2 waveform, the high level period of the SG.sub.2 waveform
is earlier than the high level period of the SG.sub.1 waveform, and
so on.
[0039] After the enablement performed on scan lines GL.sub.n, . . .
, GL.sub.3, GL.sub.2, GL.sub.1 during the second frame period T2
has finished, a second color backlight is provided. In the present
embodiment, the second color backlight is a green backlight. The
green backlight is provided, for example, by a portion of the
backlight sources 212 which emits green light.
[0040] After the provision of the second color backlight has
stopped, the scan lines GL.sub.1, GL.sub.2, GL.sub.3, . . . ,
GL.sub.n are enabled again in the next frame period (referred as a
third frame period in the following). It should be noted that in
the present embodiment, the order of enabling the scan lines
GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n in the third frame
period and the order of enabling the scan lines GL.sub.1, GL.sub.2,
GL.sub.3, . . . , GL.sub.n in the second frame period T2 are
reversed to each other. However, the order of enabling the scan
lines GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n in the third
frame period and the order of enabling the scan lines GL.sub.1,
GL.sub.2, GL.sub.3, . . . , GL.sub.n in the first frame period T1
are the same.
[0041] In other words, during the third frame period, the scan
lines GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n are
sequentially enabled again in the present embodiment. That is, the
time of enabling the (i-1).sup.th scan line is earlier than the
time of enabling the i.sup.th scan line. After the scan lines
GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n have finished the
enablement performed during the third frame period, a third color
backlight is provided. In the present embodiment, the third color
backlight is a blue backlight. The blue backlight is provided, for
example, by another portion of the backlight sources 212 which
emits a blue light.
[0042] As aforementioned, the scanning orders of the scan lines
GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n in two neighboring
frame periods are reversed with respect to each other. Therefore,
if the time point of the backlight module 210 providing the colored
light and the time point at which the enablement performed on the
scan line GL.sub.n within one of the frame periods has stopped are
close so as to affect the display quality of the last few rows of
pixel units, the time point of the backlight module 210 providing
the colored light then is close to the time point at which the
enablement performed on the scan line GL.sub.1 with the next frame
period has stopped so as to improve the display quality of the last
few rows of pixel units and vice versa. Compared to traditional
display panels disclosed in related arts, the intermixing occurred
in the last few rows of pixel units in the color sequential display
200 of the present embodiment can be greatly reduced to obtain
superior display quality.
[0043] Based on the concept above-mentioned, the actions performed
by the color sequential display 200 in the next three frame periods
(referred as the fourth frame period, the fifth frame period, and
the sixth frame period) can be speculated. During the fourth frame
period, the scan lines GL.sub.n, . . . , GL.sub.3, GL.sub.2,
GL.sub.1 are enabled sequentially and the first color backlight
(i.e. the red backlight) is provided after all the scan lines
GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n are enabled. During
the fifth frame period, the scan lines GL.sub.1, GL.sub.2,
GL.sub.3, . . . , GL.sub.n are enabled sequentially and the second
color backlight (i.e. the green backlight) is provided after all
the scan lines GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n are
enabled. During the sixth frame period, the scan lines GL.sub.n, .
. . , GL.sub.3, GL.sub.2, GL.sub.1 are enabled sequentially and the
third color backlight (i.e. the blue backlight) is provided after
all the scan lines GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n
are enabled.
[0044] Thereafter, the color sequential display 200 repeats the
actions in the first frame period T1 to the sixth frame period to
display images. The first, the second, the third, the fourth, the
fifth, and the sixth frame periods are respectively 1/180 second,
for instance.
Second Embodiment
[0045] A display method of the color sequential display 200 shown
in FIG. 1 is illustrated in the following. The spirit of this
embodiment is similar to that of the first embodiment, a main
difference between the present embodiment and the first embodiment
is that the backlight module 210 in the color sequential display
200 of the present embodiment further provides a fourth color
backlight.
[0046] Referring to FIG. 1 and FIG. 2 simultaneously, in the
present embodiment, the actions of enabling the scan lines
GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n in the first frame
period to the fourth frame period can refer to the illustrations in
the first embodiment. Here, the first color backlight (i.e. the red
backlight), the second color backlight (i.e. the green backlight),
and the third color backlight (i.e. the blue backlight) are
respectively provided in the first frame period, the second frame
period, and the third frame period, for example. However, during
the fourth frame period, the fourth color backlight which emits
white light is provided, for example. Practically, the white
backlight can be attained by turning on all of the backlight
sources 212 simultaneously for providing the red backlight, the
green backlight, and the blue backlight.
[0047] Afterwards, the color sequential display 200 repeats the
actions in the first frame period to the fourth frame period to
display images. The first, the second, the third, and the fourth
frame periods are respectively 1/240 second, for instance.
The Third Embodiment
[0048] A display method of the color sequential display 200 shown
in FIG. 1 is illustrated in the following. The spirit of this
embodiment is similar to that of the first embodiment, a main
difference between the present embodiment and the first embodiment
is that each frame period in the present embodiment further
includes a plurality of sub-frame periods. Herein, the backlights
provided within different sub-frame periods of the same frame
period have different colors.
[0049] Referring to FIG. 1 and FIG. 2 simultaneously, in the
present embodiment, the actions of enabling the scan lines
GL.sub.1, GL.sub.2, GL.sub.3, . . . , GL.sub.n in the first frame
period and the second period can refer to the illustrations in the
first embodiment, and thus are not described hereinafter.
Nevertheless, in the present embodiment, the first frame period is
further divided into a first sub-frame period, a second sub-frame
period, and a third sub-frame period. The second frame period is
also further divided into a fourth sub-frame period, a fifth
sub-frame period, and a sixth sub-frame period.
[0050] As aforementioned, the color of the color backlight provided
during the first sub-frame period is red, the color of the color
backlight provided during the second sub-frame period is green, and
the color of the color backlight provided during the third
sub-frame period is blue. On the other hand, the color of the color
backlight provided during the fourth sub-frame period is red, the
color of the color backlight provided during the fifth sub-frame
period is green, and the color of the color backlight provided
during the sixth sub-frame period is blue.
[0051] Thereafter, the color sequential display 200 repeats the
actions in the first frame period and the second frame period to
display images. The first and the second frame periods are
respectively 1/60 second, for example. The first, the second, the
third, the fourth, the fifth, and the sixth sub-frame periods are
respectively 1/180 second, for instance.
[0052] It should be noted that in other embodiments, each frame
period is divided into four sub-frame periods of approximately
1/240 second. The colors of the color backlight provided during the
first three sub-frame periods are respectively red, green, and
blue, and the backlight color provided during the fourth sub-frame
period is white. In practice, the white backlight can be attained
by turning on all of the backlight sources 212 simultaneously for
providing the red backlight, the green backlight, and the blue
backlight.
[0053] In principle, the scanning orders of the scan lines in two
neighboring frame periods are reversed with respect to each other
in the invention. Hence, in all the embodiments aforementioned, it
is also assumed that in the scanning orders during the first frame
period T1, the third frame period, and the fifth frame period, the
time the i.sup.th scan line is enabled is earlier than the time the
(i-1).sup.th scan line is enabled. Furthermore, in the scanning
orders during the second frame period T2, the fourth frame period,
and the sixth frame period, the time the (i-1).sup.th scan line is
enabled is earlier than the time the i.sup.th scan line is
enabled.
[0054] In summary, in the invention, the intermixing occurred in
the last few rows of pixel units in traditional display panels is
reduced by the reversed scanning order of the scan lines within two
neighboring frame periods in the color sequential display. As a
consequence, the color shift phenomenon is also reduced. Overall,
the display method of the color sequential display according to the
invention improves the display quality of the color sequential
display.
[0055] Although the invention has been described with reference to
the above embodiments, it will be apparent to one of the ordinary
skill in the art that modifications to the described embodiment may
be made without departing from the spirit of the invention.
Accordingly, the scope of the invention will be defined by the
attached claims not by the above detailed descriptions.
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